vrahane commented on code in PR #3117:
URL: https://github.com/apache/mynewt-core/pull/3117#discussion_r1419508360
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kernel/os/src/os_eventq.c:
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@@ -69,7 +69,8 @@ os_eventq_put(struct os_eventq *evq, struct os_event *ev)
* Check if task is sleeping, because another event
* queue may have woken this task up beforehand.
*/
- if (evq->evq_task->t_state == OS_TASK_SLEEP) {
+ if (evq->evq_task->t_state == OS_TASK_SLEEP &&
+ evq->evq_task->t_flags & OS_TASK_FLAG_EVQ_WAIT) {
Review Comment:
I think I did not do a good job at explaining this. So, what is happening is
that we have the default task waiting on a semaphore. The task actually wakes
up when another event is scheduled on the eventq. So, what this change does is
it forces the scheduler to be blocked on the semaphore even though an event is
scheduled if thats what the task has been waiting for.
The above code did the right thing back in 2015-2016 before we added
`os_eventq_poll()`. You will have to go back into `incubator-mynewt-core` to
look at the exact code.
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